Zook, A., Zook, A., & Troester, R. R. (1989). Oral history interview with Albert and Anna Zook.
Lua i Stíl Chicago (17ú heag.)Zook, Albert, Anna Zook, agus Rosalie Riegle Troester. Oral History Interview with Albert and Anna Zook. 1989.
Lua MLA (8ú heag.)Zook, Albert, et al. Oral History Interview with Albert and Anna Zook. 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.